Signal Processing & Wavelets

• Image Processing
  
  

• Programs in Category Signal Processing & Wavelets
  
  

  Title Summary Primary Author Date 1D Signal Analysis One- and three-stage decomposition of a test signal, reconstruction, reconstruction error. Kevin Amaratunga 2002-08-08 Approximation with Scaling Function Approximation of functions by the scaling function and its translates. Kevin Amaratunga 2002-08-08 Basic Filter Examples Basic filter examples, upsampling and downsampling. Kevin Amaratunga 2002-08-08 Biorthogonal Scaling Compute the samples of the biorthogonal scaling functions and wavelets. Kevin Amaratunga 2002-08-08 Calculate and plot the DFT (magnitude) for the triangular window Calculate and plot the DFT (magnitude) for the triangular window defined by W[n]= 0, n<0 n+1, 0<=n<=99 200-(n+1), 100<=n<=198 0, n>198 Compare peak sidelobe level and sidelobe roll-off rate for this window with those of the rectangular window Debashis Paul 2005-03-31 Convolution of two vectors This is the total algorithm of convolution Mohendra Roy 2007-03-14 Daubechies Scaling Compute the samples of Daubechies scaling function and wavelet using the inverse DWT. Kevin Amaratunga 2002-08-08 Eigenvalues of Transition Matrix Compute the eigenvalues of the transition matrix. Kevin Amaratunga 2002-08-08 Freeman chain code Freeman Chain Code function Computes the Freeman chain code of a boundary. Chandan Nath 2009-05-07 Image registration The program performs image registration using the function fminsearch for minimizing the scale parameters. The success of the alignment estimated using the correlation criterion. Marios Vlachos 2005-11-08 k-mean Algorithm for segmentation of digital image k-mean algorithm is very handy in image segmentation. Here first the histogram is created and then the centriod is initialized, The number of clusters should be supplied by the user and the input image should be a greylevel image. Chandan Nath 2009-05-07 Local Thresholding Find the local threshold of an image while dividing the image in 6 parts muhammad irfan 2006-06-23 Mallat Pyramid Mallat pyramid decomposition. Kevin Amaratunga 2002-08-08 Polynomial Data Examination Examine how polynomial data behaves in the filter bank when the lowpass filter has p zeros at pi. Kevin Amaratunga 2002-08-08 Polyphase Filter Polyphase filter implementation with two channels. Kevin Amaratunga 2002-08-08 Product Filter Examples Illustrates product filters of varying degree graphically. Kevin Amaratunga 2002-08-08 RF Utilities A collection of m-files that allow plotting of Smith Charts, Admittance Charts etc. Also Time Domain Reflectometry (TDR) for balanced and un-balanced transmission lines, using standard to mixed mode S-param conversion. NEILL TUCKER 2008-11-16 SERIES: seismic record post-processing calculate ductility, elastic, psd spectra from an accelerogram (ASCII format). Generate syntectic records, principal directions, evolutive spectra. Esneyder Montoya 2005-03-17 Signal smoothing and dc component removal The program performs signal smoothing and dc component removal using the 1-D fft transform. Cutting a different range of frequencies we can perform various 1-D filtering applications. Marios Vlachos 2005-11-08 Treatment of Boundaries Demonstrate symmetric extension at the boundaries for the 9/7 filters. Kevin Amaratunga 2002-08-08